Queegebo.com has a very helpful tutorial here: http://www.queegebo.com/cars-a-other-vehicles-articles-top-166/31-1997-Ford-f-150-46.html
Search Google and you will find a few very good videos on how to do this.
I thought my core was going bad - got the stinky smell from my AC vents - did some looking here on the web and found a tip to turn on the heat - that confirmed it for me as the huge billowing mist or smoke came out - called pep boys just now - they want 1000 bucks to fix - 721 for labor - 150 for AC dump and recharge (not sure this is needed) and then 72 bucks for the part. Good luck.
Drain the radiator. Disconnect the heater hoses. Remove the screws holding the heater core case and remove the whole assembly. Remove the core and install the new on in the case. Reverse the procedure to finish the installation.
REMOVE CENTER CONSOLE REMOVE AIR BAGS REMOVE ENTIRE DASH REMOVE HEATER BOX REMOVE HEATER CORE INSTALLATION IS SAME IN REVERSE...I'M DOING MINE RIGHT NOW. -JAY
Open up both front doors and remove everything from the front seat to the firewall, no kidding.
The problem is the blend door, not the heater core. Any mechanic worth anything should have checked and replaced the blend doors while it was apart to replace the heater core. Check heatertreater.net for diagnostic information and some real help.
That is called a quick disconnect fitting and it requires a SPECIAL tool to get it loose.
The dash has to be remove and the evaporator/ heater case has to be removed and separated. This job is best left to a repair shop.
i believe my 99 calls for like 10 hours labor. gott aremove the front fender etc. pain in the butt IF YOU REMOVE THE FRONT FENDER TO GET TO THE HEATER CORE YOU MUST BE POLISH, THE HEATER CORE IS BEHIND THE DASH INSIDE THE DUCTING, YOU MUST DROP THE STEERING COLUMN AND REMOVE THE DASH (7SCREWS) PULL THE DASH BACK TO GET ACCESS TO THE HEAT AND AIR DUCT AND THEN REMOVE THE TOP OF DUCT AND THEN YOU WILL SEE YOUR HEATER CORE
Before CHanging the Heater Core, have you tried flushing it? I have a 99' Jimmy and have to do this every year to get my heater to work.
Open both front doors, remove everything, replace heater core, reinstall everything. Don't laugh, that is pretty much what you have to do. If you want to tackle the job yourself I would suggest purchasing a shop manual for that vehicle to help you through step by step.
how do you change the heater core on a 99 cadillac deville? I need to know, "Kaiser."
With a quick disconnect tool. Your local auto parts store has them and they are not expensive.
99 Durango doesn't have a Heater Control Valve, It only has a thermostat